So far, I’ve taken a self-defense course, a yoga class and two cooking classes. Next up, I’m eyeing basic photography and possibly dabbling in painting. Apparently, I’m not the only one taking advantage of Main Line School Night’s 500 courses offered every semester: Its annual enrollment is now at 6,000 students. Seventy-five this year, MLSN is throwing an anniversary party this month. An aptly priced $75 ticket includes live music, appetizers, craft beer, wine, student art exhibits and a silent auction. All proceeds go toward MLSN’s mission of “enhancing community life by providing adults with opportunities to pursue lifelong learning.” Visit mainlineschoolnight.org.